Combined latch and lock



UNTTED STATES EECE.

PATENT COMBINED LATCH AND LOCK..

SPECIFICATIQN forming" part of Letterslatent No. 236,189, dated vJanuary4, 1881.

Application lcd October 1, 1880.

To all whom it may concern:

Be it known that we, EDWARD SNYDER and ISRAEL ADAMS, both ot' Worcester,in the county of Worcester and State of Massachuand in which- Figure lisa sectional view of a portion ot' a door with our im proved latch andlock applied thereto, the devices being shown in side view with the sideplate of the latch-case removed. Fig. 2 is a vertical transverse sectionat the p0- sitionindicated by line am, Fig. l. Fig.3 is a horizontalsectional view through the latch-case and knob-spindle. Fig. 4 is ahorizontal sectional view, showing the locking-bolt. Fig.5 shows theform of the key, and Fig. 6 shows the key-hole plate.

The object of our invention is to make a cheap, serviceable, and securelatch and lock adapted for use on the doors of buildings; and ourinvention consists in mechanism constructed and organized as shown inthe accompanying drawings, and applied to use as herein described, theparticular subject-m atter claimed being definitely specified.

A denotes the door; B, the face-plate; C, the latch-bolt, arrangedwithin a cylindrical case, B', fastened to the face-plate B.

D indicates the follower, through which the knob-spindle E passes, andby means ot' which the latch-bolt G is drawn back when the knob isrotated. The followerD is connected to the rear end of the latch by alink, F, one end otl which is attached by a pin, d, to the side of thefollower D, and its other end looped over a pin, o, at the rear end ot'the latch-bolt G, as illustrated. A spring, G,is provided for throwingthe latch-bolt C forward in the ordinary manner.

H indicates the lock-bolt, arranged below the latch-case, and workingthrough an opening in the face-plate B. Said lock-bolt is of cylindricalform and runs directly in the wood A, Without other casing.

a slot in its upper side, into which a spur or It is provided withv(Model.)

projection, e, on the latch-case extends, and serves to prevent theboltHfrom working out of proper position. A space or recess, i, isformed on the under side of the bolt for the bit oi' the key to enter.

f Vorking within a suitable slot, l, near the rear end ot' the bolt H,is an arm, f, which eX- tends down from the follower-link F in themanner shown. This arm serves to throw forward the lock-bolt H by thelatch action. The slot Z, when open, lets the arm f movev back withoutdrawing the bolt H. A spring, J, is iixed to the side of the bolt togive friction for retaining the bolt from jarring out oi' adjustment.

L is a thumb-knob for moving the bolt by hand at the inner side of thedoor.

The key K is made, as in Fig. 6, with the bit centrally recessed to fitthe ward in the recess i ot' the bolt. Variation can be effected bychanging the form of the ward and recess il.

The key-hole I is made in the shape shown in Figs. l and 7, and isformed vby boring the hole I through the wood of the door, then sawingkerfs or slots m m to the right and left. The wood is then taken outabove the kerfs to the bolt-recess. The lower side of the key-hole is onthe solid wood, and the key is entered with the bit either to the rightor left, according to the direction in which it is desired to move thebolt H.

The lock and latch are applied to the door by boring two auger-holes, MN, into the edge of the door at proper distance apart, then boringtransversely through for the key-hole and knobspindle, also the spacefor the thumb-knob L. The wood between the holes M N is removed for anarrow space along the center, as at P, and the faceplate mortised intothe edge of the door.

It will thus be seen that the labor of applying the lock and latch tothe door is very slight, comparatively, while the wood of the door isbut little cut away.

It will also be observed that the wood of the door serves in lieu of acase for the lock, that the mechanism is simple and cheap ofapplication, while its effect in operation is that of roo a securedead-holt or night-lock. The door is locked by the latch or knob, butrequires to be unlocked by means of the key or the inside thumb-knob L.

What We claim as of our invention, and desire to secure by LettersPatent, is-

1. The combination, with the cylindrical latch-case, provided with theface-plate, latchbolt, and latch-operating mechanism, of a locking-boltadapted to be let into a cylindrical opening directly in the wood of thedoor and arranged for locking by a movement of the latch mechanism,substantially as set forth.

2. The bolt H, having recesses and Ward i, and friction-spring J, asdescribed, in combination with the door provided with the cylindricalopening or auger-hole N and the keyhole recess I m, formed substantiallyas set forth.

